Burner or carbon holder



4 l 613 078 Jan 1927 J. w. BRENKERT ET AL BURNER OR CARBON HOLDER Filed April 17, 1924 2 Sheets-Sheet 1 an uc n l'o'cm [li in /1i afrozucua Jan. 4', J. W. BRENKERT ET AL BURNER OR CARBON HOLDER Filed April 17, 1924 2 Sheets-Sheet 2 llflfllflllllllllllllllllllllllli Patented Jan. 4, 1927."

. UNITED S A ES,

PATENT o iosnrn w. namixnar AND nan nannxnar, or HIGHLAND ranx, 110mm.

BURNER OR CARBON HOLDER.

This invention relates to a burner or carbon holder of that type used in connection with movin picture machines, spot and flood lights, lantern houses and other places where an electric current is supplied to sticks of carbon for producing an are light. The sticks of carbon are in opposed relation and it is necessary that the same be adjusted from time to time'in order to obtain a perfact are.

Our invention aims to provide a burner of the above type that is characterized by the novel construction and adjusting mechanism which permits of carbon sticks being easily and accurately shifted relative to eac 1 other, the ad usting mechanism including means for simultaneously shifting the carbon sticks in a linear direction to or from each other; shifting one of the carbon sticks horizontally in a plane at a right angle to the vertical plane of the burner, and swinging the other carbon stick horizontally in an are relative to the burner, these three adjustments permitting of the ends of the carbon sticks being placed in such juxtaposition as to insure a perfect operative relation for an electric are.

Our burner includes numerous means over burners heretofore used and all of these means will be brou ht out as the construction is hereinafter described, by aid of the drawings, wherein- Figure 1 is a side elevation of the burner;

Fig. 2 is a bottom lan of the same;

Fig. 3 is a front e evation of the burner;

Fig. 4 is a vertical cross sectional view of the same;

Fig. 5 is a top plan of the burner, and

Fig. 6 is a horizontal sectional view of a portion of the burner.

In the drawing, 1 denotes a gear housing provided with tubular portions 2 in which are mounted guide rods 3 and 4. Assuming that the burner is used in a vertical position, the guide rod 4 extends upwardly and the guide rod 3 extends downwardly. In addition to the tubular portions 2 there are tubular guide-ways 5 and slidable in these guide-ways are rod like racks 6 and 7 normally confronting each other so that a pinion 8 may mesh with said racks'for adjusting the same longitudinally of the housing 1. The inion 8 is mounted on the shaft 9 journale in the housing 1 and mounted on the outer end of the shaft is a universal joint 10 for an operating rod 11 provided with a hand wheel 12. The housing 1 is cut away so that easy access may be had to the pinion 8 by removing a detachable cover plate 13. I

Mounted on the upper end of the rack 6 is a su port 14 provided with an arm 15 which is slidable on the upstanding guide rod 4 and said guide rod cooperates with the rod like rack 6 in maintaining the support 14 in a defined relation to the gear housing so that said support may be moved to a front gear housing without an wobbling or tiltin action. Slidable in t e su port 14 are the laterally extending gui erods 16 and 17 of a bracket 18 which is movable to and'from the support 14 at a right angle to the plane of the guide rod 4 and the rack 6.

Rotatably mounted in the su port 14, parallel to the guide rods 16an 17, is a feed screw 19' in screwthreaded engagement with the nut portion 20 of the bracket 18 and said feed screw has a head 21 retained in the support 14 to prevent longitudinal movement of the screw in the support and thus efi'ect movement of the bracket 18 rela tive to said support. On the rear end of the screw 19 is a universal joint 22 provided with a rod 23 and hand wheel 24, these last three mentioned elements being similar to the elements 10, 11 and 12 previously described.

Attached to the bracket 18 by screws 25 or other fastenin whch is insulated rom the bracket 18 by an insulatin washer 27. The T-head of the arm 26 as a side extension 28 provided with screw hole clamps 29 and 30. The clamp 29 holds the bared end 31 of an electrical conductor and the clamp holds the insulated casing or arm- 32 of said electric conductor both clamps cooperating in properly supporting the electric conductor with the clamp 30 taking any stresses or strains off of the bared end 31 of the conductor incident to such connection.

Attached to the outer end of the arm 26 by screws 33 or other fastening means is the shank ortion 34 of a stationary V-jaw 35 which as a lateral extension 36 for a pivoted adjustable jaw 37 which has one end confronting the aw 35 and its opposite end normally engaged by a thumb screw 38 carried by the shank 34 of the stationary aw 35. The jaws '35 and 37 are adapted to cooperate in holding a depending or upper carbon means is a T-arm 26 rica; v

39. If the carbon is too small to be held by engagement of the jaws and 37, the jaw 35 may be provided with a V-insert having a hook 41 on its upper end by which it may be detachably suspended in the jaw 35 from the upper end of said jaw to cooperate with the jaw 37 for engagement with a small carbon.

Thus far we have described means for raisin and lowering the carbon 39 and shifting it liorizontally in a plane at a ri ht angle to the gear housin 1, the first adjustment being accomplishe by rotating the handle rod 11 to actuate the pinion and rack, and the consequent adjustment being accomplished by rotating the handle rod 23 to actuate the feed screw 19.

Mounted on the lower end of the depending rack 7 is a support 42 having an arm 43 slidable on the dc ending guide rod 3 and said arm is provi ed with a bearing 44 for a feed screw 45 provided with a universal joint 46 supporting a rod 47 and a. hand wheel 48.

Pivotally mounted on the lower end of the rack 7 to laterally swing thereon is the bifurcated and apertured extension 49 of a bracket 50 provided with a socket M for the ball end 52 of the feed screw 45. said socket and ball establishing a universal connection between the bracket and feed screw which permits of the feed screw being adjusted to laterally swing the bracket 50.

Attached to the bracket50 by screws 53 or other fastening means is an insulated T- arm 54 provided with an electric conductor 55 and clamping means 56 for a lower carbon 57, said clamping means and the manner of supporting the electric conductor 55 being similar to the like equipment for the upper carbon 39.

It is now apparent that when the upper carbon 39 is raised and lowered by virtue of the hand rod 11 that the lower carbon 57 is also shifted vertically, and in addition to this simultaneous adjustment of the carbons the lower carbon 57 may be swun horizontally in an are relative to the racr 7 by manipulation of the rod 47. The T-arms 26 and 54 are safely insulated relative to the supporting brackets thereof and consequently t e rods 11, 23 and 47 may be safely manipulated for adjusting the carbons 39.

and 57.

We desire to direct attention to a few features of our burner which are not found in other burners and have proven advantageous in this class of burners. First, on account of the burners being subjected to heat when in operation there is expansion and when the. burners cease to operate there is contraction, consequently the adjustable parts of the burner cannot be as accurately fitted as though contraction and expansion did not exist to an appreciable degree. If a burner simply has a rack and pinion adjustment, without our guide rods 3 and 4, there is a very loose construction which prevents any degree of accuracy in properly positioning carbons, but by using our guide rods 3 and 4 stability is insured in connection with the rack and pinion mechanism, so that carbons may be raised and lowerel and proper alinement maintained. Second, we

attach considerable importance to the. manner of holding the lower bracket 50. See

Fig. 2. There is the extension 49 carried by the lower end of the rack 7 and the ball and socket connection which is some distance from the rack. In consequence of this arrangement there is a wide bearing oint for the bracket and the T-arm 54. The twopoint bearing across the rack ermits of oose fitting of the parts without 0st motion in the lower carbon supporting arm, and as brought out in the beginning such loose fitting is necessary to permit of eas movement of the adjustable parts whent e burncr is in operation and parts'expan'ded due to heat. The same idea of a wide bearing is carried out in connection with the upper carbon and combining the advanta es of these wide bearings with that gained y the guide rods 3 and 4, there is a ver substantial structure that permits of a justments being easily made to properly position the carbons. Further, we desire to direct attention to the carbon holders which have adjusting screws outside of the T-arms 26 and 54 where the screws may be easily manipulated, and by virtue of the adjustable jaws engaging the front sides of the carbons it is obvious that carbons, of various diameters can be correctly positioned. This is not pos sible where the clamping jaws have a side clamping action on carbons, for the reason that any difference in the diameter of the carbons will place one carbon out of alinement with the other. lVith our construction it is possible to maintain the light source in the center of the lens and this is a distinct advantage compared to carbons that are otherwise held.

Any suitable means may be employed for supporting the burner in a lam housing or other structure and while in t e drawings there are illustrated a preferred embodiment of our invention, it is to be understood that the structural elements are susceptible to such variations and modifications as fall within the scope of the appended claims.

What we claim is 1. A burner of the type described, comprising a gear housing, guide rods carried thereby, racks slidablc in said housing, a pinion in said housing adapted for simultaneously shiftin said racks, supports on said racks and slida le on said guide rods, brackets supported from said supports, carbon holders supported from said bracket, a screw on one of said supports having a universal connection with the carbon holder of said bracket adapted to swing said bracket in an arc, and a screw and nut arrangement on the other support adapted to shift the bracket thereof away from said support.

2 In an arc lamp mechanism, an adjustable support, a laterally swingable bracket pivotally connected to said support, means independent of the said support having universal connection with said bracket for adjustin said bracket, and a carbon holder carrie by said bracket.

In testimony whereof we aflix our signal-- tures.

" JOSEPH W. BRENKERT. KARL BRENKERT. 

